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$RESPONSE 变量未显示在 if 块中。在我的代码中我已经准确地评论了
#!/bin/bash
TIME=`date +%d-%m-%Y:%H:%M:%S`
cat sites.txt | while read site
do
URL="http://$site"
RESPONSE=`curl -I $URL | head -n1`
echo $RESPONSE #echo works
if echo $RESPONSE | grep -E '200 OK|302 Moved|302 Found' > /dev/null;then
echo "$URL is up"
else
#$RESPONSE variable empty. Returns [TIME] [URL] is DOWN. Status:
echo "[$TIME] $URL is DOWN. Status:$RESPONSE" | bash slackpost.sh
fi
done
有什么想法如何通过管道传输 $RESPONSE 文本吗? $RESPONSE 保存像curl这样的字符串:(6)无法解析主机.....或HTTP.1.1 200 OK
答案1
你的脚本确实有效。你确定你的sites.txt
是正确的吗?例如,我尝试过:
$ cat sites.txt
google.com
unix.stackexchange.com
yahoo.com
我将您的脚本保存为foo.sh
,并在上面的文件上运行它给出:
$ foo.sh 2>/dev/null
HTTP/1.1 302 Found
http://google.com is up
HTTP/1.1 200 OK
http://unix.stackexchange.com is up
HTTP/1.1 301 Redirect
[10-03-2017:20:49:29] http://yahoo.com is DOWN. Status:HTTP/1.1 301 Redirect
顺便说一句,正如您在上面看到的,对于正在重定向的 yahoo.com 来说,它失败了。也许更好的方法是使用 ping 来检查。像这样的东西(包括其他一些一般性改进):
while read site
do
if ping -c1 -q "$site" &>/dev/null; then
echo "$site is up"
else
echo "[$(date +%d-%m-%Y:%H:%M:%S)] $site is not reachable."
fi
done < sites.txt
如果您确实需要状态,请使用:
#!/bin/bash
## No need for cat, while can take a file as input
while read site
do
## Try not to use UPPER CASE variables to avoid conflicts
## with the default environmental variable names.
site="http://$site";
response=$(curl -I "$site" 2>/dev/null | head -n1)
## grep -q is silent
if grep -qE '200 OK|302 Moved|302 Found|301 Redirect' <<<"$response"; then
echo "$site is up"
else
## better to run 'date' on the fly, if you do it once
## at the beginning, the time shown might be very different.
echo "[$(date +%d-%m-%Y:%H:%M:%S)] $site is DOWN. Status:$response"
fi
done < sites.txt